alleryA 50 kg person stands on a weighing scale inside a lift accelerating upward at 2 m s⁻² (g = 10 m s⁻²). The scale reads:
A500 N
B100 N
C400 N
D600 N
Answer & Solution
Correct answer: D. 600 N
Vertical equation in the lift: N − mg = ma ⟹ N = m(g + a) = 50(10 + 2) = 600 N.
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